Air bag



J. H. SMITH.

AIR BAG.

FILED JAN. 6. 1922.

Patented dan. 2, 1923.

.TAY HQ sii/LITE, or san FRANCISCO, CALIFORNIA.-

A'In BAG;

Application sie@ January s, 1922. serial 1ro. 527,353.

To all whom t may concern Be it known that l, JAY H. SMITH, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented a new and useful Air'Bag, of which the following is especifica-tion. i

This invention relates to air bags for use in connection with tire vulcanizing vInachines, one of the objects ofthe invention being to provide a bag consisting of anouter casing of any suitable material provided with a removable inner tube vor air container which can be easily placed in or removed from position, the saine being securely held in lace when in use.

nother object is to provide an outer casing which does not require the. use .of metal fastening means and which presents a smooth surface to the article being vulcanized.

A still furtherv object is to provide a bag of this character the parts of which are easily interchangeable so that either the casing or the inner tube can be replaced with a new one in the event of wear or deteriora` tion.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination` and arrangement of parts and in the detailsl of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes inthe precise embodiment of the invention shown can be made without departing from the spirit of the invention.`

In the accompanying drawings lthe preferred form of the invention has been shown..

In said drawings Figure 1 is a longitudinal section through the device, the inner tube being shown partly section and partly in elevation. Figure 2 is a longitudinal section thro-ugh another forni of device,

Figure 3 is a longitudinal section through another modification.

Figure Liis a section. on line w-e, Fig' ure 2.

Referring to the figures by characters of reference, 12 designates a fabric casing closed at one end as shown at 13 while the other end is left open.v An airtight inner tube 15 is insertible into the open end of the casing 12 so as to completely lill the casing and to project beyond the open end thereof and, as shown in Figure 1 the casing may beprovided near its open end with an annular `depression 16.` A, rigid. cap v17 is adapted to be placed over the exposed end of the inner tube and over the open endr portion of the casing, thisv cap being provided at its kmargin with an inwardly eX- tending continuous rib 18 adapted tobe placed in the `depression 16. -A nipple 19l is extended from the projecting end ofthe inner tube 15 and is adapted to extend through a central opening 2O in the cap17 so as to be engaged by an air tube 21'.k 'I l y in using this form of, devi-ce the inner tube is placed in position in the casing. The cap 17 is then placed'over the nipple 19 so that its rib'18 will extend into the depression 16.` The inner 'tube 15 is then inflated by means of air directed through the tubel 21 and kwhen this inner tube is inflated it` willdistend the casing 12and also cause. the open end portion ofthe.casing` 'as-well as the projecting end of the'inner tube -15 to bind tightlyk upon the inner. surfacefof the cap 17, holding the rib 18 firmly -interlocked vwith the depressed portion 16.l Thus the parts will be held properly/,assembled as long` as the inner tube is inflated.

Instead of using a single` casing open at one vend two similar opposed casings such as shown at 22 and 23 can be telescoped one into the other so as to completely house the inner tube-24. Another casing, closed at one end, can be slipped over the telescoping casings 22 and 23, as shown at 25. The open end portion of this outer casing25 is l adapted to project into a cap 26 corresponding with the cap 17 and through which the nipple 27 extends from the innerl tube 24.

Thus when the inner tube is inlatedthe parts of the casing will be distended, the open end portion of the outer casing binds ing tightly against the cap so as to properly engage the inwardly extending rib 28 at.

the edge of the cap. l v

Another forni of the device, shown in Figure 8 consists of a casing 29y open at. both ends. An airtight inner tube 30v is insertable into either open end of the casing 29 so as to completely fill the casing and to project beyond the open ends thereof and, as shown in Figurel 6 the casing may be provided near its open ends, with annular depressions 33. Rigid caps 32 are adapted to be placed over the open portions of the casing; these caps are provided at from either projecting end 4oit' the inner tube and is adapted to extend throi'ighaV cen'- trai opening` 35 in cap 32 so as to be engaged by an air tube ii'or inflating the inner tube 30. l i

In using this form of device the inner tube is placed inposition in the casing, the cap 32 is placed over the nipple 86 so that its rib 34 will extend into the depression 33 and the other cap 32 is then placed so that its rib 34 Will also extend into the depression The inner, tube .is-then inflated by means of air directed through the tube 36 and when the innery tube 30 is initiated it will distend 'the casing 29 and-also cause the open end portions of the easing as well as the inner surfaces of caps 32. holding the' ribs 34 firmly interlocled with the depressed portions 33. Thusthe parts will be held proper y assembled as long as the inner tube is iniiated. Y

What is claimed is: v l. An air bag including a easing having an open end, there being an'snnular depression' in the casing and adjacent said end,

an airtightA inner tube insertibleninto the casing7 a cap Yier housing the open end of the casing, an interior annular rib Within and integral with ythe cap, said inner tube when inflated constituting means for distending the easing to grip the cap the depression forming a seat for the rib, and a nipple extending from the tube and through the cap for engagement by an air tube.

2. An air bag including telescopicl easings each open at one end, said easings being oppositely disposed, an airtight inner tube housed by the casings, a cap housing the open end of one of the easings, an interior annular rib Within the cap, said inner tube when iniated constituting means for die# tending the casings to hold the-m assembled with the cap, and a nipple extending from the inner tube and through the cap for engagement by an air tube.

3. An air bag including a casing having two open ends, there being depressions'in the casing andeadjacent said ends, an air tight inner tube inserted into' the easing-,and caps for housing the open endsl of the casing, means Within the cap for seating in the depressions,` said inner tube ,when inflated constituting means for distending the casing to grip the caps, and a nipple extending from the air tight inner tube and through one of the caps for engagement by an air tube.-

In testimonythat I claim the foregoing as my own, I have hereto aiixed my signature in the presence of two Witnesses.

l JAY H. Sil/HTH.

Vitnesses JOHN H. Cinxnns,

" FLOYD N. SMITH. 

